I also have an E6500 and see the same flaky behavior with my touchpad.
r...@rhau-laptop:~$ xinput -list
"Virtual core pointer" id=0 [XPointer]
Num_buttons is 32
Num_axes is 2
Mode is Relative
Motion_buffer is 256
Axis 0 :
Min_value is -1
Max_value is -1
Resolution is 0
Axis 1 :
Min_value is -1
Max_value is -1
Resolution is 0
"Virtual core keyboard" id=1 [XKeyboard]
Num_keys is 248
Min_keycode is 8
Max_keycode is 255
"AT Translated Set 2 keyboard" id=2 [XExtensionKeyboard]
Num_keys is 248
Min_keycode is 8
Max_keycode is 255
"HID 413c:8157" id=3 [XExtensionKeyboard]
Num_keys is 248
Min_keycode is 8
Max_keycode is 255
"Video Bus" id=4 [XExtensionKeyboard]
Num_keys is 248
Min_keycode is 8
Max_keycode is 255
"Macintosh mouse button emulation" id=5 [XExtensionPointer]
Num_buttons is 32
Num_axes is 2
Mode is Relative
Motion_buffer is 256
Axis 0 :
Min_value is -1
Max_value is -1
Resolution is 1
Axis 1 :
Min_value is -1
Max_value is -1
Resolution is 1
"PS/2 ALPS DualPoint TouchPad" id=6 [XExtensionPointer]
Num_buttons is 32
Num_axes is 2
Mode is Relative
Motion_buffer is 256
Axis 0 :
Min_value is -1
Max_value is -1
Resolution is 1
Axis 1 :
Min_value is -1
Max_value is -1
Resolution is 1
DMESG
[ 542.068494] psmouse.c: issuing reconnect request
[ 542.599497] synaptics was reset on resume, see synaptics_resume_reset if you
have trouble on resume
[ 543.536733] input: DualPoint Stick as
/devices/platform/i8042/serio1/input/input11
[ 543.582886] input: AlpsPS/2 ALPS DualPoint TouchPad as
/devices/platform/i8042/serio1/input/input12
[ 703.976093] CE: hpet increasing min_delta_ns to 15000 nsec
[ 765.972244] CE: hpet increasing min_delta_ns to 22500 nsec
[ 913.979397] psmouse.c: DualPoint TouchPad at isa0060/serio1/input0 lost sync
at byte 5
[ 913.980420] psmouse.c: DualPoint TouchPad at isa0060/serio1/input0 lost sync
at byte 1
[ 913.985205] psmouse.c: DualPoint TouchPad at isa0060/serio1/input0 lost sync
at byte 1
[ 913.986402] psmouse.c: DualPoint TouchPad at isa0060/serio1/input0 lost sync
at byte 1
[ 913.987585] psmouse.c: DualPoint TouchPad at isa0060/serio1/input0 lost sync
at byte 1
[ 913.987591] psmouse.c: issuing reconnect request
[ 914.498336] synaptics was reset on resume, see synaptics_resume_reset if you
have trouble on resume
[ 915.774945] hda-intel: IRQ timing workaround is activated for card #0.
Suggest a bigger bdl_pos_adj.
[ 916.585221] input: PS/2 ALPS DualPoint TouchPad as
/devices/platform/i8042/serio1/input/input13
--
ALPS DualPoint Touchpad flaky performance
https://bugs.launchpad.net/bugs/296610
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